{"id":109,"date":"2021-05-21T21:03:55","date_gmt":"2021-05-21T21:03:55","guid":{"rendered":"https:\/\/hnords.de\/wordpress\/?page_id=109"},"modified":"2022-01-18T22:58:26","modified_gmt":"2022-01-18T21:58:26","slug":"albinaria","status":"publish","type":"page","link":"https:\/\/hnords.de\/wordpress\/albinaria\/","title":{"rendered":"Albinaria in Crete"},"content":{"rendered":"

Albinaria<\/em> species in Crete<\/strong><\/p>\n

Hartmut Nordsieck (IX. 2021, updated XI. 2021)<\/p>\n

I. Introduction and species list<\/h4>\n

All clausiliid species in Crete belong to the genus Albinaria<\/em> Vest 1867. Though Crete represents only a relatively small part of the distributional range of the genus, its species number (40) amounts to one third of the species number of the whole genus. This means that Albinaria<\/em> achieves the maximum of its diversity on that island. The fragmented landscape, favourable limestone rock areas in three mountain ranges (Lefka, Idi, Dikti Mountains) with many gorges and adjacent lower areas separated by unfavourable plains, may have played an important role for the diversification of the genus, just as the ecological differentiation into insolated open rock-faces and sheltered rock sites as two main habitats for different species of the genus (Gittenberger 1991). There are no other clausiliid groups which compete with the Albinaria<\/em> species for these niches. The climatic differences between the northern and the southern parts of the island have certainly caused a further diversification (see part II). Besides, diversity has been increased by endemic species originated on northern peninsulas (Gramvousa, Rodopos, Akrotiri) and small islets, especially in the north of Crete (Pondikonisi Island, Dia Island, Dionisades Islands).<\/p>\n

The species are listed as follows (in alphabetical order):<\/p>\n

Mainland Crete:<\/p>\n

A<\/em>. amalthea<\/em> (Westerlund 1878)
\nA<\/em>. ariadne<\/em> Schilthuizen & Gittenberger 1991
\nA<\/em>. arthuriana<\/em> (O. Boettger 1878)
\nA<\/em>. byzantina<\/em> (Charpentier 1852)
\nA<\/em>. candida<\/em> (L. Pfeiffer 1850)
\nA<\/em>. christae<\/em> Wiese 1989
\nA<\/em>. corrugata<\/em> (Brugui\u00e8re 1792)
\nA<\/em>. cretensis<\/em> (Rossm\u00e4ssler 1836)
\nA<\/em>. eburnea<\/em> (L. Pfeiffer 1854)
\nA<\/em>. eikenboomi <\/em>H. Nordsieck 2019
\nA<\/em>. fulvula<\/em> Flach 1988
\nA<\/em>. hippolyti<\/em> (O. Boettger 1878)
\nA<\/em>. idaea<\/em> (L. Pfeiffer 1850)
\nA<\/em>. leonisorum<\/em> (O. Boettger 1901)
\nA<\/em>. li<\/em> Welter-Schultes 1999
\nA. loosjesi <\/em>H. Nordsieck 1977
\nA<\/em>. maltzani<\/em>\u00a0 (O. Boettger 1883)
\nA<\/em>. moreletiana<\/em> (O. Boettger 1878)
\nA<\/em>. praeclara<\/em> (L. Pfeiffer 1853)
\nA<\/em>. rebeli<\/em> A. J. Wagner 1924
\nA<\/em>. sphakiota<\/em> (Maltzan 1887)
\nA<\/em>. spratti<\/em> (L. Pfeiffer 1846)
\nA<\/em>. sturanyi<\/em> A. J. Wagner 1924
\nA<\/em>. sublamellosa<\/em> (O. Boettger 1883)
\nA<\/em>. tenuicostata<\/em> (L. Pfeiffer 1865)
\nA<\/em>. terebra<\/em> (L. Pfeiffer 1853)
\nA<\/em>. teres<\/em> (Olivier 1801)
\nA<\/em>. troglodytes<\/em> (A. Schmidt 1868)
\nA<\/em>. ulrikae<\/em> Schilthuizen & Gittenberger 1990
\nA. vexans<\/em> (O. Boettger 1883)
\nA<\/em>. violacea<\/em> Schilthuizen & Gittenberger 1990
\nA<\/em>. virginea<\/em> (L. Pfeiffer 1846)
\nA<\/em>. wiesei<\/em> Gittenberger 1988
\nA<\/em>. xanthostoma<\/em> (O. Boettger 1883)<\/p>\n

Pondikonisi Island:
\nA<\/em>. pondika<\/em> Welter-Schultes 2010<\/p>\n

Dia Island:
\nA<\/em>. jaeckeli<\/em> Wiese 1989
\nA<\/em>. retusa<\/em> (Olivier 1801)
\nA<\/em>. torticollis<\/em> (Olivier 1801)<\/p>\n

Dionisades Islands:
\nA<\/em>. janicollis<\/em> Schultes & Wiese 1991
\nA<\/em>. janisadana<\/em> Loosjes 1955<\/p>\n

After having worked through the revisions of Welter-Schultes (2000, 2010), in which several species have been united with other ones,\u00a0 I see no reason to change the rank of the species (Nordsieck 2017, this article part III).
\nA survey of all known Albinaria<\/em> taxa from Crete with pictures was given by Kittel & Hirschfelder (2018).<\/p>\n

II. Shell morphology<\/h4>\n
    \n
  1. Grouping of species<\/li>\n<\/ol>\n

    According to shell morphology, the species have been assembled within five groups (Nordsieck 1999):<\/p>\n

      \n
    1. candida<\/em> group: A<\/em>. amalthea<\/em>, A<\/em>. arthuriana<\/em>, A<\/em>. candida<\/em>, A<\/em>. fulvula<\/em>, A<\/em>. hippolyti<\/em>, A<\/em>. leonisorum<\/em>, A<\/em>. loosjesi<\/em>, A<\/em>. pondika<\/em>, A<\/em>. ulrikae<\/em>, A<\/em>. violacea<\/em>, A<\/em>. wiesei<\/em>, A<\/em>. xanthostoma<\/em>;<\/li>\n
    2. torticollis<\/em> group: A<\/em>. christae<\/em>, A<\/em>. jaeckeli<\/em>, A<\/em>. torticollis<\/em>;<\/li>\n
    3. cretensis<\/em> group: A<\/em>. byzantina<\/em>, A<\/em>. cretensis<\/em>, A<\/em>. eburnea<\/em>, A<\/em>. eikenboomi<\/em>, A<\/em>. sphakiota<\/em>, A<\/em>. sublamellosa<\/em>, A<\/em>. tenuicostata<\/em>, A<\/em>. troglodytes<\/em>, A<\/em>. vexans<\/em>, A<\/em>. virginea<\/em>;<\/li>\n
    4. teres<\/em> group: A<\/em>. ariadne<\/em>, A<\/em>. corrugata<\/em>, A<\/em>. idaea<\/em>, A<\/em>. janicollis<\/em>, A<\/em>. janisadana<\/em>, A<\/em>. li<\/em>, A<\/em>. maltzani<\/em>, A<\/em>. moreletiana<\/em>, A<\/em>. praeclara<\/em>, A<\/em>. retusa<\/em>, A<\/em>. spratti<\/em>, A<\/em>. terebra<\/em>, A<\/em>. teres<\/em>;<\/li>\n
    5. caerulea<\/em> group: A<\/em>. rebeli<\/em>, A<\/em>. sturanyi<\/em>.<\/li>\n<\/ol>\n

      The first three groups contain only species endemic for Crete. The fourth group includes additionally to the endemic species from Crete some from Cyclades, Dodecanese and Cyprus. The two species of the fifth group are similar to A<\/em>. caerulea<\/em>. They have extremely restricted ranges; possibly they originate from forms which have reached Crete from the Aegean islands.
      \nThe proposed groups are based only on shell morphology. The grouping does not claim to present monophyletic groups, as assumed by some authors, because it is clear that there is a certain amount of convergences in shell morphology. Therefore, a ranking of these groups as subgenera, as proposed again in MolluscaBase (2018), is rejected.<\/p>\n

        \n
      1. Characters of closing apparatus<\/li>\n<\/ol>\n

        Like in other Albinaria<\/em> groups (Nordsieck 1999) species with more plesiomorphic characters of closing apparatus = CA and species with more apomorphic ones can be recognized.
        \nThe complete CA of Albinaria<\/em> is regarded as plesiomorphic (Nordsieck 1997), because it is improbable that its complex palatal system has evolved several times de novo from the reduced one without palatal plicae. It is characterized as follows (Fig. 1): All palatal plicae present, especially anterior upper palatal plica (aupp), anterior lower palatal plica = basalis (bas) and posterior lower palatal plica = subclaustralis (scl); clausilium plate (cp) normally developed (fitted in the frame of lunellar and subcolumellar lamella). In few species even a lowest palatal plica = sulcalis (sul) is present; it must not be confounded with the posterior lower palatal plica.<\/p>\n

        \"\"\"\"<\/a> \"\" \"\"<\/p>\n

        Fig. 1. Characters of CA, example Albinaria<\/em> ulrikae<\/em>, GR, Crete, near Rodia, ex N. Body whorl, oblique view into aperture and view on lunellar. Shell height 22.1 mm.
        \nAbbreviations: aupp = anterior upper palatal plica, bas = anterior lower palatal plica = basalis, cp = clausilium plate, il = inferior lamella, lu = lunella, pr = principal plica, scl = subclaustralis, sl = superior lamella, sp = spiral lamella, sul = sulcalis, upp = (posterior) upper palatal plica.<\/h5>\n

        If one compares the Albinaria<\/em> species from Crete, species with all states from most plesiomorphic CA to most apomorphic one are present (Figs. 2-5). Especially the recognition of species with plesiomorphic CA may be of interest for the reconstruction of the phylogeny of Albinaria<\/em> on Crete. 11 from 40 species, i. e. about a fourth of the species, exhibit a more plesiomorphic CA. These are the following (in alphabetical order, with range information, abbreviations see Fig. 1):<\/p>\n

        A<\/em>. amalthea<\/em>, N. W. Crete: aupp and bas present;
        \nA<\/em>. ariadne<\/em>, N. W. central Crete: bas present;
        \nA<\/em>. arthuriana<\/em>, N. E. central Crete: aupp and bas present, even sul;
        \nA<\/em>. candida<\/em>, N. W. Crete: aupp and bas present, aupp in part reduced;
        \nA<\/em>. fulvula<\/em>, S. E. central Crete (Fig. 4): bas present;
        \nA<\/em>. hippolyti<\/em> (aphrodite<\/em> O. Boettger), N. W. central Crete: aupp and bas present;
        \nA<\/em>. hippolyti<\/em> (hippolyti<\/em>, holtzi<\/em> Sturany), N. W. central Crete: bas present;
        \nA<\/em>. loosjesi<\/em>, N. W. Crete: aupp present, bas reduced;
        \nA<\/em>. pondika<\/em>, Pondikonisi island (N. W. Crete): aupp and bas present;
        \nA<\/em>. ulrikae<\/em> (Fig. 2), A<\/em>. violacea<\/em>, N. W. central Crete: aupp (in part two) and bas present, even sul;
        \nA<\/em>. wiesei<\/em>, N. W. eastern Crete (Fig. 3): aupp and bas present;
        \nA<\/em>. xanthostoma<\/em>, N. W. Crete: bas present.<\/p>\n

        According to the degree of reduction, the Cretan species are ordered as follows:<\/p>\n

        A<\/em>. arthuriana<\/em>, A<\/em>. ulrikae<\/em> (Fig. 2), A<\/em>. violacea<\/em>: even sul present;
        \nA<\/em>. amalthea<\/em>, A<\/em>. h<\/em>. aphrodite<\/em>, A<\/em>. pondika<\/em>, A<\/em>. wiesei<\/em> (Fig. 3): aupp and bas present; also A<\/em>. candida<\/em>, but aupp in part reduced, and A<\/em>. loosjesi<\/em>, but bas reduced;
        \nA<\/em>. fulvula<\/em> (Fig. 4), A<\/em>. h<\/em>. hippolyti<\/em>, A<\/em>. h<\/em>. holtzi<\/em>, A<\/em>. xanthostoma<\/em>: bas present;A<\/em>. leonisorum<\/em>, A<\/em>. sublamellosa<\/em>, A<\/em>. eikenboomi<\/em>, A<\/em>. troglodytes<\/em>: bas in part or rudimentary present;
        \nremaining species (e. g., A<\/em>. idaea<\/em> Fig. 5): named palatal plicae absent.<\/p>\n

        \"\"<\/a><\/p>\n

        Figs. 2-5. Albinaria<\/em> species in Crete. Frontal, body whorl with view on lunellar and oblique view into aperture. Shell height = H (mm).
        \n1. A<\/em>. ulrikae<\/em>, CA much plesiomorphic, GR, Crete, near Rodia, ex N; H 22.1.
        \n2. A<\/em>. wiesei<\/em>, CA less plesiomorphic, GR, Crete, Selinari church near Neapoli, paratype, ex NNM 56084; H 16.85.
        \n3. A<\/em>. fulvula<\/em>, CA more apomorphic, GR, Crete, N. of Anatoli, paratype, ex NNM 56092; H 17.1.
        \n4. A<\/em>. idaea<\/em> amabilis<\/em>, CA much apomorphic, GR, Crete, Kedros Mountains, paratype, ex NNM 56824; H 16.9.<\/h5>\n

        A further important character of the CA is the position of the lunellar. In most species taxa the lunellar is dorsally to dorsolaterally situated. In some taxa, however, it is in deeper position, lateral or deeper. These are the following: A<\/em>. amalthea<\/em> (amalthea<\/em>), A<\/em>. hippolyti<\/em> (asterousea<\/em> Schilthuizen, Welter-Schultes & Wiese), A<\/em>. leonisorum<\/em>, A<\/em>. sphakiota<\/em>, A<\/em>. troglodytes<\/em> (interpres <\/em>Westerlund), A<\/em>. violacea<\/em> (dextrogyra<\/em> Schilthuizen & Gittenberger). An extreme case is A<\/em>. jaeckeli<\/em>, in which the lunellar is in ventral position. Like in other clausiliids, the change to a deeper position of the lunellar is regarded as a better protection against evaporation. It is interesting that \u2013 except for A<\/em>. jaeckeli<\/em> \u2013 all taxa with deeply situated lunellar belong to the groups with plesiomorphic CA (groups 1 – 4). In the taxa with apomorphic CA (group 5) the lunellar is nearly invariable. Protection against desiccation is achieved by the secretion of an epiphragma in aestivation. According to my experience species with much plesiomorphic CA do not secrete such epiphragmas.
        \nIt is striking that the species with the most plesiomorphic CA (group 1) have also the plesiomorphic character white surface layer of the shell absent (Fig. 2). In several species with plesiomorphic CA the inferior lamella is high; like in other Alopiinae this is also regarded as a plesiomorphic character (Figs. 2-3).
        \nIf one compares the ranges of the Cretan Albinaria<\/em> species it results that all species with plesiomorphic CA (except of A<\/em>. fulvula<\/em>) are distributed in the northern part of Crete or on northwestern islets. The reason may be that these parts of Crete have not so extreme climatic conditions than the other parts of the island (southern part, mountains, other islets).<\/p>\n

          \n
        1. Character protoconch sculpture<\/li>\n<\/ol>\n

          The position of the beginning of the protoconch sculpture has revealed to be an important character for the definition of species taxa in Crete (Nordsieck 2017) (Figs. 6-7). Three groups (I-III) containing the following taxa are recognized.<\/p>\n

          I (ribbing begins in the course of the first whorl): A<\/em>. idaea<\/em> (rolli<\/em> group), A<\/em>. janicollis<\/em>, A<\/em>. teres<\/em> (manselli <\/em>O. Boettger), A<\/em>. praeclara<\/em> (praeclara<\/em> group), A<\/em>. virginea<\/em> (rodakinensis <\/em>Wiese), A<\/em>. terebra<\/em>;<\/p>\n

          II (ribbing begins at about the beginning of the second whorl): A<\/em>. ariadne<\/em>, A<\/em>. idaea<\/em> (remaining subspecies), A<\/em>. maltzani<\/em>, A<\/em>. praeclara <\/em>(parallelifera<\/em> group).<\/p>\n

          III (ribbing begins in the course of the second whorl or near to its end): remaining species or subspecies.<\/p>\n

          In A<\/em>. praeclara<\/em> and A<\/em>. idaea<\/em> subspecies of groups I and II are included. The latter is an especially interesting case, because the differences of this character within the species have not been noticed until now. Engelhard & Slik (1994) gave a number of unribbed apical whorls (1-2.6), which, however, is higher than that of the first smooth part of the protoconch. Nordsieck (1998) stated that ribbing always begins with the second whorl, also not correct. Welter-Schultes (2000, 2010) studied only number and prominence of the ribs of the second whorl, not the position of their first appearance. In this respect, A<\/em>. i<\/em>. rolli<\/em> and the two subspecies from the Paximadia Islands belong to group I, the remaining subspecies to group II (Nordsieck 2017: 17).<\/p>\n

          \"\"<\/a><\/p>\n

          Figs. 6-7. Protoconch of Albinaria<\/em> species (from above).
          \n6. Protoconch (scheme): 1= ending of first whorl, 2. = of second whorl. I – III = groups with different position of the beginning of protoconch sculpture: Group I = in the course of the first whorl. Group II = at about the beginning of the second whorl. Group III = in the course of the second whorl or near to its end.
          \n7. SEM-photos of the protoconch of Albinaria<\/em> species, ex SMF. Scale 300 \u03bcm. Group I: A<\/em>. terebra<\/em>, GR, Crete, Kefali Peninsula near Kali Limenes. Group II: A<\/em>. i<\/em>. idaea<\/em>, GR, Crete, Idi Mountains between Kamares and Lochria. Group III: A<\/em>. corrugata inflata<\/em>, GR, Crete, Knossos near Iraklion.<\/h5>\n

          III. Genital morphology<\/h4>\n

          With regard to the species number in the past the genitalia of only few Albinaria<\/em> species from Crete have been examined.
          \nA. J. Wagner (1924, 1925) gave short descriptions of the genitalia of eight species (A<\/em>. arthuriana<\/em>, A<\/em>. corrugata<\/em>, A<\/em>. aphrodite<\/em> = A<\/em>. hippolyti<\/em>, A<\/em>. rebeli<\/em>, A<\/em>. cretensis<\/em> = A<\/em>. sphakiota<\/em>, A<\/em>. sturanyi<\/em>, A<\/em>. sublamellosa<\/em>, A<\/em>. virginea<\/em>). In the course of their work on hybrid zones in A<\/em>. hippolyti<\/em>, Schilthuizen & Lombaerts in Schilthuizen (1994) examined the genitalia of some subspecies of that species. My own work until now concerns 18 species, mainly of the A<\/em>. cretensis<\/em> group (A<\/em>. amalthea,<\/em> A<\/em>. byzantina<\/em>, A<\/em>. candida<\/em>, A<\/em>. corrugata<\/em>, A<\/em>. cretensis<\/em>, A<\/em>. eburnea<\/em>, A<\/em>. eikenboomi<\/em>, A<\/em>. loosjesi<\/em>, A<\/em>. praeclara<\/em>, A<\/em>. sphakiota<\/em>, A<\/em>. sublamellosa<\/em>, A<\/em>. tenuicostata<\/em>, A<\/em>. terebra<\/em>, A<\/em>. teres<\/em>, A<\/em>. troglodytes<\/em>, A<\/em>. violacea<\/em>, A<\/em>. virginea<\/em>, A<\/em>. xanthostoma<\/em>). The presence \/ absence of the penial caecum and the length relations of the parts are of importance for characterizing species. A grouping of the species based on genital morphology, however, was not possible until now.
          \nA comparison of the species of the A<\/em>. cretensis<\/em> group is of special interest, because the species system within this group is controversial (see Welter-Schultes 2000, 2010).
          \nIn the past four species of the group have been examined: A<\/em>. virginea<\/em>, A<\/em>. sphakiota<\/em> (A. J. Wagner 1924: 10, 13); A<\/em>. sublamellosa<\/em> (A. J. Wagner 1925: 59, fig. 113), and A<\/em>. mitylena<\/em> = A<\/em>. byzantina<\/em> (Fuchs & K\u00e4ufel 1934: 78, fig. 7). The description of A<\/em>. virginea<\/em> of Wagner is in contrast to my results (see below), because it is said to have a penial caecum and a biramous penial retractor. Perhaps, another species is concerned. A<\/em>. sublamellosa<\/em> is classified by Wagner with Delima<\/em> (as type species of a subgenus Priodelima<\/em>), because the penial caecum is absent.
          \nMy examination of nine species of the cretensis<\/em> group and four species of the candida<\/em> group from 28 localities of western Crete (1-3 specimens per sample) has revealed considerable differences mainly in the male copulatory organs, which are useful for species delimitation. For comparison also some species from eastern Crete have been examined (see above).
          \nThe result is that the species of the A<\/em>. cretensis<\/em> group differ by the presence of a penial caecum or instead a penial papilla and in the length relations of the copulatory organs (see Fig. 8). Two groups of species could be recognized, those with penial caecum and penis of normal length with distal granular zone (A<\/em>. tenuicostata<\/em>, A<\/em>. eikenboomi<\/em>, A<\/em>. eburnea<\/em>,\u00a0A<\/em>. cretensis, A<\/em>. sphakiota<\/em>, Fig. 8a) and those with penial papilla and shortened penis with extended granular zone (A<\/em>. troglodytes<\/em>, A<\/em>. virginea<\/em>, A<\/em>. sublamellosa<\/em>, Fig. 8c, d). A<\/em>. byzantina<\/em> has an intermediary position, because it exhibits a reduced penial caecum and a shortened penis with extended granular zone (Fig. 8b). The characters of the first group are regarded as plesiomorphic, because they are shared by many other Albinaria<\/em> species and other genera of the Alopiini.
          \nThe differences between the species, which have been assembled by Welter-Schultes (2010) within the megaspecies A<\/em>. \u201ccretensis\u201d, <\/em>are of special interest. A. byzantina<\/em>, A<\/em>. troglodytes<\/em> and A<\/em>. virginea<\/em> have a short penis (Fig. 8b-c), in A<\/em>. cretensis<\/em> it is of normal length (Fig. 8a). A<\/em>. byzantina<\/em> has a reduced penial caecum (which forms a small loop); the epiphallus is very long (nearly double normal length). In A<\/em>. troglodytes<\/em> and A<\/em>. virginea <\/em>instead of a penial caecum a penial papilla is present; the epiphallus is long. A<\/em>. cretensis<\/em> has a fully developed penial caecum and an epiphallus of normal length. All four species have an undivided penial retractor (in A<\/em>. cretensis<\/em> penial branch reduced). Thus, A<\/em>. \u201ccretensis<\/em>\u201d includes species which are rather different; it is certainly no monophyletic unit.
          \nThe other species have the following characters:
          \nA. sublamellosa<\/em> is like A<\/em>. troglodytes<\/em> and A<\/em>. virginea<\/em>, but smaller.
          \nA<\/em>. sphakiota<\/em> is like A.<\/em> cretensis<\/em>, with biramous penial retractor, penial branch weakened.
          \nA<\/em>. tenuicostata<\/em> has a biramous penial retractor and a fully developed penial caecum which is relatively long.
          \nA<\/em>. virginea<\/em> subsp. from Paleochora (fortress), which has been misidentified as A<\/em>. tenuicostata<\/em> so far, is like A<\/em>. troglodytes<\/em> and A<\/em>. virginea<\/em>.
          \nA<\/em>. eburnea<\/em> is similar to A<\/em>. cretensis<\/em>, because it has epiphallus and penis of normal length and a fully developed penial caecum. The penial retractor is biramous to undivided. All characters are in contrast to A<\/em>. byzantina<\/em> with which it has been united by Bamberger et al. (2021). Therefore, it remains here to be regarded as a species of its own.
          \nA<\/em>. eikenboomi<\/em> is similar to A<\/em>. xanthostoma <\/em>(see below).<\/p>\n

          \"\"<\/a><\/p>\n

          Fig. 8. Male copulatory organs (penes) of species of the Albinaria cretensis<\/em> group (schematized).
          \na = A<\/em>. cretensis<\/strong><\/em>, b = A<\/em>. byzantin<\/em>a, c = A<\/em>. troglodytes<\/em>, d = A<\/em>. sublamellosa<\/em>.
          \nAbbreviations: dep = distal part of epiphallus, p = penis, pap = penial papilla, pc = penial caecum.<\/h5>\n

          As concerns the species of the candida<\/em> group from the same region, the result is as follows:\u00a0 A<\/em>. candida<\/em> and A<\/em>. loosjesi<\/em> are like A<\/em>. troglodytes<\/em> and A<\/em>. virginea <\/em>(penis shortened, with penial papilla instead of penial caecum). A<\/em>. amalthea<\/em> and A<\/em>. xanthostoma<\/em> are similar to A<\/em>. tenuicostata<\/em> (penis of normal length, with well-developed penial caecum). The combination of A<\/em>. xanthostoma<\/em> and A<\/em>. loosjesi<\/em> in one species by Welter-Schultes (2010) is thus proved as inappropriate. The taxon from Cape Spada, determined as A<\/em>. tenuicostata<\/em> subsp. (Nordsieck 2017: 13), is more similar to A<\/em>. xanthostoma<\/em> and therefore classified with that species. The candida<\/em> group species, which exhibit a more or less complete, i. e. plesiomorphic CA (see part II), are obviously not closely related.
          \nThe examined species from eastern Crete do not much differ; they all have a penis of normal length, a penial caecum and a more or less biramous penial retractor. A<\/em>. corrugata<\/em> and A<\/em>. teres<\/em> are similar; A.<\/em>\u00a0praeclara<\/em> exhibits a relatively longer vagina.<\/p>\n

          Fig. 9<\/h5>\n

          Bamberger et al. 2021:<\/p>\n

          The authors present a DNA analysis of the A<\/em>. cretensis<\/em> group based on genome-wide ddRAD sequences. The aim of the paper is the evaluation of some methods for species delimitation. The topology of the resulting tree is as follows (fig. 2):
          \nA<\/em>. tenuicostata<\/em> is basal to the other species.
          \nThe form from Agia Irini (= A<\/em>. sp. 1), until now included in A<\/em>. tenuicostata<\/em> (Nordsieck 2017: 17, fig. 14),\u00a0 is within A<\/em>. tenuicostata<\/em> the sister group of the majority of the A<\/em>. tenuicostata<\/em> samples.
          \nA<\/em>. byzantina<\/em> is basal to the remaining species.
          \nA<\/em>. eburnea<\/em> is basal to the rest of the remaining species.
          \nThe rest of the species forms two clades: A<\/em>. sublamellosa<\/em> and A<\/em>. cretensis<\/em> group sensu stricto + A<\/em>. virginea<\/em> group.
          \nA<\/em>. sublamellosa<\/em> includes the type form of A<\/em>. troglodytes vexans<\/em>, because this taxon has a sublamellosa<\/em> genome, admixed with genes of other species. It is regarded here as species of its own, because it differs from A<\/em>. sublamellosa<\/em> in shell shape and sculpture, another inferior lamella and a more deeply situated closing apparatus. It occurs sympatrically with it in the Samaria gorge, with few transitional specimens (named until now A<\/em>. s<\/em>. heteroptyx<\/em>).
          \nThe other clade includes the A<\/em>. cretensis<\/em> group sensu stricto (A<\/em>. cretensis<\/em>, A<\/em>. sphakiota<\/em>) and the A<\/em>. virginea<\/em> group (A<\/em>. virginea<\/em>, A<\/em>. troglodytes<\/em>) as sister groups.
          \nWithin the A<\/em>. virginea<\/em> group clade the other form of former A<\/em>. troglodytes vexans<\/em> (A<\/em>. troglodytes interpres<\/em>) is basal.
          \nTwo samples of western (coastal) A<\/em>. virginea<\/em> (= A<\/em>. sp. 2) are basal to the remaining samples of the group.
          \nWithin the remaining A<\/em>. virginea<\/em> group \u2013 except of the hybrid form from Kournas which comes out basal to A<\/em>. virginea<\/em> \u2013 A<\/em>. virginea<\/em> and A<\/em>. troglodytes<\/em> are sister groups.
          \nThe former contains A<\/em>. rodakinensis<\/em>, because of its ribbed protoconch formerly regarded as species of its own, the latter the third included sample of western (inland) A<\/em>. virginea<\/em>.
          \nThe species of the megaspecies A<\/em>. \u201ccretensis<\/em>\u201d appear in two different clades, A<\/em>. byzantina<\/em> clade and clade of A<\/em>. cretensis<\/em> group sensu stricto + A<\/em>. virginea<\/em> group. Thus, like in genital morphology and the own DNA analysis that taxon reveals as non-monophyletic.
          \nAs result of their species delimitation method, Bamberger et al. regard the taxa called A.<\/em> sp. 1 and A<\/em>. sp. 2 as species, while A<\/em>. byzantin<\/em>a and A<\/em>. eburnea<\/em> are united to one species. The other clades are evaluated as species; within the A<\/em>. cretensis<\/em> group sensu stricto A<\/em>. cretensis<\/em> and A<\/em>. sphakiota<\/em> are separated as species.
          \nThe authors have only considered shell morphology for their work. If one compares the results of the genome-wide analysis with those of the genital examination (part III), the following is stated (see Fig. 8):
          \nA<\/em>. tenuicostata<\/em> has the plesiomorphic type of male copulatory organs (penial caecum present, penis and epiphallus of normal length).
          \nA<\/em>. byzantina<\/em> has apomorphic male copulatory organs (penial caecum reduced to a loop, penis shortened, epiphallus much lengthened).
          \nA<\/em>. eburnea<\/em> and the A<\/em>. cretensis<\/em> group sensu stricto have the plesiomorphic type of male copulatory ogans like A<\/em>. tenuicostata<\/em>.
          \nA<\/em>. sublamellosa<\/em> and the A<\/em>. virginea<\/em> group have the apomorphic type of male copulatory organs (penial papilla instead of penial caecum present, penis shortened, epiphallus more or less lengthened) in common.
          \nThe A<\/em>. tenuicostata<\/em> form separated by Bamberger et al. as A<\/em>. sp. 1 is like A<\/em>. tenuicostata<\/em>, but has another penis shape.
          \nThe western A<\/em>. virginea<\/em>, separated as A<\/em>. sp. 2 (which includes the misidentified A<\/em>.\u00a0„tenuicostata<\/em>“\u00a0from Paleochora, see above), corresponds to the A<\/em>. virginea<\/em> group.
          \nBecause of their different genital morphology, the union of A.<\/em> byzantina<\/em> and A<\/em>. eburnea<\/em> within one species is not supported; therefore, both taxa are proposed to be regarded as species of their own.
          \nIt is of special interest to check the copulatory organs of the A<\/em>. cretensis<\/em> group species which occur syntopically. According to Bamberger et al. the examined species from six localities, where they occur syntopically, show no admixture, except of those from two localities with small admixture percentages. The results of the check are as follows (from west to east):
          \nKaliviani: A<\/em>. tenuicostata<\/em>, A<\/em>. virginea<\/em> (= sp. 2 sensu Bamberger et al.);
          \nMili: A<\/em>. tenuicostata<\/em>, A<\/em>. virginea<\/em> (= troglodytes<\/em>);
          \nAradena: A<\/em>. troglodytes<\/em>, A<\/em>. sphakiota<\/em>, A<\/em>. sublamellosa<\/em>;
          \nChora Sfakion: A<\/em>. troglodytes<\/em>, A<\/em>. sublamellosa<\/em>;
          \nImbros: A<\/em>. troglodytes<\/em>, A<\/em>. sphakiota<\/em>;
          \nDrapanos: A<\/em>. troglodytes<\/em>, A<\/em>. byzantina.<\/em>
          \nIn four of these cases the species differ by their copulatory organs (see above). If A<\/em>. sublamellosa<\/em>, the male copulatory organs of which\u00a0 are like those of A<\/em>. troglodytes<\/em>, is involved (Aradena, Chora Sfakion), both species differ by their size. It seems as if different male copulatory organs and different size reduce or even prevent gene flow between the closely related species.
          \nAnother case of locality with syntopy is Samaria gorge (lower entrance), where two taxa with A<\/em>. sublamellosa<\/em> genome (A<\/em>. vexans<\/em>, A<\/em>. s<\/em>. obliterata<\/em>) occur syntopically, with transitions (named heteroptyx<\/em>). A<\/em>. vexans<\/em> shows admixture from other species, A<\/em>. s<\/em>. obliterata<\/em> not. It is unsatisfactory to name both taxa simply A<\/em>. sublamellosa<\/em>, as Bamberger et al. do, because they are morphologically much different (insufficiently considered by the authors). Further investigations are necessary to clear up the occurrences and relationship of both taxa in the whole Samaria region.<\/p>\n

          References<\/h4>\n

          Bamberger, S., Xu, J. & Hausdorf, B. (2021): Evaluating species delimitation methods in radiations: The land snail Albinaria cretensis<\/em> complex on Crete. \u2013 Systematic Biology: 65 pp. http:\/\/mc.manuscriptcentral.com\/systbiol<\/p>\n

          Dimopoulou, A., Antoniou, A., Mylonas, M., Vardinoyiannis, K. & Poulakakis, N. (2017): Inferring phylogenetic patterns of land snails of the genus Albinaria<\/em> on the island of Dia (Crete, Greece). \u2013 Systematics and Biodiversity, 15<\/strong> (5): 1-13.<\/p>\n

          Douris, V., Cameron, R. A. D., Rodakis, G. C. & Lecanidou, R. (1998): Mitochondrial phylogeography of the land snail Albinaria<\/em> in Crete: long-term geological and short-term vicariance effects. \u2013 Evolution, 52<\/strong>: 116-125.<\/p>\n

          Engelhard, G. H. & Slik, J. W. F. (1994): On altitude dependent characters in Albinaria idaea<\/em> (L. Pfeiffer, 1849), with a revision of the species (Gastropoda Pulmonata: Clausiliidae). \u2013 Zoologische Mededelingen, 68<\/strong> (3): 21-38.<\/p>\n

          Fuchs, A. & K\u00e4ufel, F. (1934): IV. Land- und S\u00fc\u00dfwassermollusken aus Griechenland und von den Inseln des \u00c4g\u00e4ischen Meeres. \u2013 In: F. Werner: Ergebnisse einer zoologischen Studien- und Sammelreise nach Griechenland, namentlich nach den Inseln des \u00c4g\u00e4ischen Meeres: 71-90, 3 pls.<\/p>\n

          Gittenberger, E. (1991): What about non-adaptive radiation? \u2013 Biological Journal of the Linnean Society, 43<\/strong>: 263-272.<\/p>\n

          Kittel, K. & Hirschfelder, H.-J. (2018): The genus Albinaria<\/em> Vest 1867 in Crete \u2013 a comprehensive and updated survey of all known taxa (Gastropoda: Pulmonata: Clausiliidae). \u2013 Acta Conchyliorum, 17<\/strong>: 1-228.<\/p>\n

          MolluscaBase (2018): Clausiliidae Gray, 1855. Accessed through: World Register of Marine Species at: http:\/\/www.marinespecies.org\/aphia.php?p=taxdetails&id=833936<\/a><\/p>\n

          Nordsieck, H. (1997): Phylogeny of and within the Albinaria<\/em>–Isabellaria<\/em> group (Gastropoda: Pulmonata: Clausiliidae). \u2013 Heldia, 4<\/strong>, Sonderheft 5: 53-61.<\/p>\n

          Nordsieck, H. (1998): A new subspecies of Albinaria idaea<\/em> (L. Pfeiffer 1850) (Gastropoda: Stylommatophora: Clausiliidae). \u2013 Heldia, 2<\/strong> (5\/6): 123-126, pl. 17.<\/p>\n

          Nordsieck, H. (1999): Annotated check-list of the species of the Albinaria<\/em>–Isabellaria<\/em> group (Gastropoda: Stylommatophora: Clausiliidae). \u2013 Mitteilungen der deutschen malakozoologischen Gesellschaft, 62\/63<\/strong>: 1-21.<\/p>\n

          Nordsieck, H. (2017): New species taxa of the genus Albinaria<\/em> Vest (Gastropoda, Stylommatophora, Clausiliidae) in Crete. \u2013 Conchylia, 48<\/strong> (1-2): 9-30, 5 pls.<\/p>\n

          Schilthuizen, M. (1994): Differentiation and hybridisation in a polytypic snail. \u2013 Thesis, Leiden University: 178 pp..<\/p>\n

          Schilthuizen, M. & Gittenberger, E. (1996): Allozyme variation in some Cretan Albinaria<\/em> (Gastropoda): paraphyletic species as natural phenomena. \u2013 In: Taylor, J. (ed.): Origin and evolutionary radiation of the Mollusca: 301-311. Oxford.<\/p>\n

          Schilthuizen, M., Gutteling, E., Van Moorsel, C. H. M., Welter-Schultes, F. W., Haase, M. & Gittenberger, E. (2004): Phylogeography of the land snail Albinaria hippolyti <\/em>(Pulmonata: Clausiliidae) from Crete, inferred from ITS-1 sequences. \u2013 Biological Journal of the Linnean Society, 83<\/strong>: 317-326.<\/p>\n

          Van Moorsel, C. H. M. (2001): Molecular phylogenetics of a speciose group: Albinaria<\/em> and the search for homology. \u2013 Thesis, Leiden University: 120 pp.<\/p>\n

          Wagner, A. J. (1924): Erg\u00e4nzungen und Erl\u00e4uterungen zur Systematik der Clausiliiden. II. Neue Formen und Arten des Genus Albinaria<\/em> ex rect. mea (Schluss). \u2013 Annales Zoologici Musei Polonici Historiae Naturalis, 2<\/strong>: 9-23.<\/p>\n

          Wagner, A. J. (1925): Studien \u00fcber die Systematik, Stammesgeschichte und geographische Verbreitung des Genus Delima<\/em> (Hartmann) A. J. Wagner. \u2013 Annales Zoologici Musei Polonici Historiae Naturalis, 4<\/strong>: 1-73, 16 pls.<\/p>\n

          Welter-Schultes, F. W. (2000): Approaching the genus Albinaria<\/em> in Crete from an evolutionary point of view (Pulmonata: Clausiliidae). \u2013 Schriften zur\u00a0 Malakozoologie, 16<\/strong>: 1-208.<\/p>\n

          Welter-Schultes, F. W. (2010): Revision of the genus Albinaria<\/em> in Crete (Greece): presence of geographically variable monotypic and polytypic species (Gastropoda: Clausiliidae). \u2013 Archiv f\u00fcr Molluskenkunde, 139<\/strong>: 143-245.<\/p>\n

           <\/p>\n","protected":false},"excerpt":{"rendered":"

          Albinaria species in Crete Hartmut Nordsieck (IX. 2021, updated XI. 2021) I. Introduction and species list All clausiliid species in Crete belong to the genus Albinaria Vest 1867. Though Crete represents only a relatively small part of the distributional range of the genus, its species number (40) amounts to one third of the species number of the whole genus. This means that Albinaria achieves the maximum of its diversity on that island. The fragmented landscape, favourable limestone rock areas in…<\/p>\n

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          IV. Allozyme and DNA analyses<\/h4>\n

          The results of different allozyme and DNA analyses are not consistent with shell morphology; compared with one another, they yield different groupings of species.<\/p>\n

          Allozyme analysis:<\/p>\n

          Schilthuizen & Gittenberger 1996:
          \nA<\/em>. corrugata<\/em>, A<\/em>. moreletiana<\/em>;
          \nA<\/em>. sublamellosa<\/em>;
          \nA<\/em>. idaea<\/em>, A<\/em>. terebra<\/em>;
          \nA<\/em>. arthuriana<\/em>, A<\/em>. spratti<\/em>, A<\/em>. hippolyti<\/em>, A<\/em>. cretensis<\/em> (= A<\/em>. virginea<\/em>), A<\/em>. christae<\/em>.
          \nThis grouping is in contrast to the close relationship of A<\/em>. sublamellosa<\/em> and A<\/em>. virginea<\/em> (see part III).<\/p>\n

          DNA analyses:<\/p>\n

          Douris et al. 1998:
          \nA<\/em>. terebra<\/em>;
          \nA<\/em>. xanthostoma<\/em>;
          \nA<\/em>. eburnea<\/em>, A<\/em>. cretensis<\/em> (= A<\/em>. virginea<\/em>), A<\/em>. violacea<\/em>, A<\/em>. spratti<\/em>, A<\/em>. ulrikae<\/em>, A<\/em>. hippolyti<\/em>, A<\/em>. corrugata<\/em>;
          \nA<\/em>. praeclara<\/em>, A<\/em>. maltzani<\/em>, A<\/em>. moreletiana<\/em>?;
          \nA<\/em>. torticollis<\/em>, A<\/em>. jaeckeli<\/em>, A<\/em>. teres<\/em>, A<\/em>. retusa<\/em>?.<\/p>\n

          Van Moorsel, van Nes, Gittenberger & Megens in Van Moorsel 2001:
          \nA<\/em>. torticollis<\/em>;
          \nA<\/em>. teres<\/em>;
          \nA<\/em>. candida<\/em>, A<\/em>. cretensis<\/em> (= A<\/em>. virginea<\/em>), A<\/em>. ulrikae<\/em>;
          \nA<\/em>. corrugata<\/em>, A<\/em>. leonisorum<\/em>, A<\/em>. wiesei<\/em>;
          \nA<\/em>. spratti<\/em>.<\/p>\n

          Van Moorsel, Schilthuizen & Gittenberger in Van Moorsel 2001:
          \nOnly well-supported groups are given:
          \nA<\/em>. ulrikae<\/em>, A<\/em>. spratti<\/em>, A<\/em>. praeclara<\/em>, A<\/em>. torticollis<\/em>, A<\/em>. cretensis<\/em> (= A<\/em>. virginea<\/em>);
          \nA<\/em>. teres<\/em>, A<\/em>. corrugata<\/em>.<\/p>\n

          Schilthuizen et al. 2004:
          \nA<\/em>. hippolyti<\/em>, A<\/em>. candida<\/em>, A<\/em>. cretensis<\/em> (= A<\/em>. virginea<\/em>), A<\/em>. ulrikae<\/em>, A<\/em>. torticollis<\/em>, A<\/em>. spratti<\/em>;
          \nA<\/em>. arthuriana<\/em>, A<\/em>. wiesei<\/em>, A<\/em>. teres<\/em>, A<\/em>. corrugata<\/em>.<\/p>\n

          Dimopoulou et al. 2017:
          \nA<\/em>. tenuicostata<\/em>;
          \nA<\/em>. moreletiana<\/em>, A<\/em>. praeclara<\/em>, A<\/em>. arthuriana<\/em>;
          \nA<\/em>. corrugata<\/em>, A<\/em>. wiesei<\/em>, A<\/em>. violacea<\/em>, A<\/em>. spratti<\/em>, A<\/em>. ulrikae<\/em>, A<\/em>. hippolyti<\/em>, A<\/em>. eburnea<\/em>, A<\/em>. sphakiota<\/em>, A<\/em>. ariadne<\/em>, A<\/em>. cretensis<\/em> (= A<\/em>. virginea<\/em>);
          \nA<\/em>. teres<\/em>, A<\/em>. sturanyi<\/em>;
          \nA<\/em>. retusa<\/em>, A<\/em>. torticollis<\/em>, A<\/em>. jaeckeli<\/em>.
          \nThis grouping is in contrast to the close relationship of A<\/em>. tenuicostata<\/em> and the other included species of the cretensis<\/em> group (see part III).<\/p>\n

          Not considering the species of Dia Island a western and an eastern group are recognizable, but there are overlappings.
          \nWestern group: A<\/em>. candida<\/em>, A<\/em>. cretensis<\/em> (= A<\/em>. virginea<\/em>), A<\/em>. eburnea<\/em>, A<\/em>. hippolyti<\/em>, A<\/em>. spratti<\/em>, A<\/em>. ulrikae<\/em>, A<\/em>. violacea<\/em>.
          \nEastern group: A<\/em>. arthuriana<\/em>, A<\/em>. corrugata<\/em>, A<\/em>. maltzani<\/em>, A<\/em>. moreletiana<\/em>, A<\/em>. praeclara<\/em>, A<\/em>. teres<\/em>, A<\/em>. wiesei<\/em>.
          \nIt is evident that the results of DNA analyses mirror the distribution of the species better than their morphological similarity.The conclusion, however, that morphology does not reflect the relationships of the species is premature. Introgression caused by hybridization, which is frequent in Albinaria<\/em> \u00a0also from Crete, might have influenced the group affiliations. The hitherto presented analyses are not yet suited to serve as a basis for a classification of the Cretan Albinaria<\/em> species.<\/p>\n

          For a 16S DNA analysis of Albinaria<\/em> species from western Crete see the following report.<\/p>\n

          In order to check the species systematics based on my work on shell and genital morphology, at my request a DNA analysis of the Albinaria<\/em> species from western Crete (marker: 16S rDNA) has been carried out by the molecular identification team biome-id (Barco & Knebelsberger w. c.). In this analysis nearly all species of the cretensis<\/em> and candida<\/em> groups have been included. As outgroup an Albinaria<\/em> species from central Crete, A<\/em>. corrugata<\/em>, deemed to be not closely related to the species concerned, has been chosen.
          \nThe conclusions from the resulting tree (Fig. 9) are the following:
          \nThe Albinaria<\/em> species from western Crete form a strongly supported clade. The cretensis<\/em> and candida<\/em> groups, however, are not recognizable in the tree, i. e. are no natural groups.
          \nThe species form several (5) lineages or subclades:
          \nA. eikenboomi, A. eburnea, A. virginea (<\/em>2 samples), A. troglodytes;
          \n<\/em>A<\/em>. amalthea, <\/em>A<\/em>. loosjesi<\/em> + A<\/em>. virginea<\/em> (1 sample);
          \nA. candida;
          \n<\/em>A<\/em>. xanthostoma<\/em>;
          \nA<\/em>. cretensis<\/em>, A<\/em>. sphakiota<\/em>, A<\/em>. tenuicostata<\/em>, A<\/em>. sublamellosa.<\/em>
          \nAll species of the candida<\/em> group, i. e. those with a plesiomorphic closing apparatus, come out in a weakly supported subclade as lineages of their own: A<\/em>. amalthea<\/em>, A<\/em>. loosjesi<\/em>, A<\/em>. candida<\/em>,\u00a0A<\/em>. xanthostoma<\/em>. Only A<\/em>. loosjesi<\/em> clusters with a neighbouring form of A<\/em>. virginea<\/em>.
          \nWithin three clades the species, which are present as basal lineages or as two of three subclades, exhibit a penis of normal length with caecum; this type of male copulatory organs is regarded as plesiomorphic. Based on the tree the apomorphic type, that with shortened penis with papilla, which is found in four lineages or subclades, has originated more than once.
          \nThe tree is in contrast to the species delimitations of Welter-Schultes (2010):
          \nA<\/em>. cretensis<\/em> sensu Welter-Schultes is distributed across three lineages or subclades, i. e. is not monophyletic;
          \nA<\/em>. amalthea<\/em> and A<\/em>. xanthostoma<\/em> do not belong to one species;
          \nA<\/em>. loosjesi<\/em> and A<\/em>. xanthostoma<\/em> do also not belong to one species.
          \nAll these conclusions were already the result of the work on genital morphology (see part III).
          \nThe species system proposed in this article is confirmed as follows:
          \nA<\/em>. eikenboomi<\/em> is a species of its own. It is related to A<\/em>. eburnea<\/em>, not to A<\/em>. xanthostoma<\/em> from the same region (Rodopou peninsula).
          \nThe A<\/em>. eburnea<\/em> subspecies from Kares, A<\/em>. e<\/em>. inflaticollis<\/em>, is within the same clade as the other A<\/em>. eburnea<\/em> subspecies. Their relationship is confirmed by genital morphology.
          \nThe taxon from Cape Spada, formerly regarded as belonging to A<\/em>. tenuicostata<\/em> (Nordsieck 2004, 2017), is a form of A<\/em>. xanthostoma<\/em>. This is also confirmed by genital morphology.
          \nA<\/em>. cretensis<\/em> and A<\/em>. sphakiota<\/em> are sister species within a subclade of its own.
          \nThe form from Epanochori, classified as belonging to A<\/em>. tenuicostata<\/em> (contrary to Welter-Schultes, Nordsieck 2017), clusters with the sample of that species included.<\/p>\n

          \"\"<\/a><\/p>\n